Arbor



UNITED EBIO L. BOHS, OIE LA SALLE, ILLINOIS.

ARBOR.

Specificatlon o! Letters Patent.

Patented Dec. 27, 1921.

Applieation filed July 6, 1920. Serial No. 394,261.

To aZl w7wm zt may concem Be it known that I, ERIC L. Bons, a citizen ofthe United States, residing in the city of La Salle, county of La Salle,and Stateof Illinois, have invented certain new and useful Improvementsin Arbors, of which the following is a specification.

My invention relates to selflocking and automatio arbors and has for itsobject the production of an arbor, on which the work to be operated isplaced, and an attempt to either rotate the work or the arborimmediately automatically looks them both together. I accomplish theseobjects by the means shown in the accompanying drawings, in Which-Figure 1 shows my arbor in part cross section on line AA, ready toreceive the work to be operated 011.

Fig. 2 is an end view of Fig. 1.

Fig. 3 is a oross-sectional view of my arbor along a line BB of Fig. 4,showing the work locked on the arbor.

Fig. 4 is an end view of Fig. 3.

Fig. 5 is a front view of the locking part of my arbor.

Fig. 6 is an end view of Fig. 5.

Fig. 7 is a front view of the stationary collar on my arbor.

Fig. 8 is an end view of Fig. 7.

Similar nnmerals refer to similar parts throughout the several views. Inthe drawings 1 represents the part of my arbor whereby it is fastenedinto the regular machinists lathe or other machine and is generally madetapered, as shown, for convenience in operation, althongh it may be madeof any other suitable or oonvenient shape. 2 is a cylindrical projectionfrom 1 having a portion 8 which is concentric with 1 and a cylindricalportion 7 which is eccentric with both 1 and 8. Rotatably mounted on 7is an eccentric bushing 4 of such proportion that When it is in theosition shown in Fig. 1, the exposed oylin rical surface is continuouswith the part 8, and when it is in the position shown in Fig. 2, itprojeets beyond the cylindrical surface 8, as shown, so that it Willthon gras the sides of the hole shown in the indicate piece of Work 6.Trying to turn the work 6 in the direction which tends to make itproject farther over 8 simply looks the work harder, While tuming thework 6 in the Opposite direction, to

make entire arb0r conform to Fig. 1, Will make the work loose, so thatit. can be removed. 5 is an eccentric collar similar to eccentric 4,which is fastened t0 7 by means of a pin 2, so that its outercylindrical sur face is concentric with that of 8, still leav ingsuflicient clearance so that 4; can rotate readily.

In operation a round hole is put in the work, slightly larger than thediameter of part 8 and bushing 4 is turned in position shown in Fig. 1and the work slipped on and when the arb0r is rotated, it is evidentthat the work is locked instantly.

VVhile I have here shown one form of my arbor, I do not wish to limitmyself to the exact form shown, but wish to have it taken in a senseillustrative of one of the many difierent forms set forth in my claims.

I claim 1. In an automatic arbor, a holding part, a largcr cylindricalpart, integral with said holding part, a smaller anxiliary cylindricalpart integral with and eccentric with said lairger cylindrical part andan eccentric col- ].ar rotatably mounted on said smaller cylindricalpart.

2. In an automatic arbor, a holding part, a larger cylindrical part,integral with said holding part, a smaller auxiliary cylindrical partintegral with and eccentric with said larger cylindrical part and aneccentric collar fastened on said small cylindrical part adjacent tosaid collar.

3. In an automatic arbor, a member, a larger cylindrical part integralWith said member, a smaller cylindrical projecting part, eccentric withsaid larger cylindrical part and integral therewith, an eccentric collarrotatably mounted on said smaller cylindrical part and a similareccentric collar fastened to said small cylindrical part, adjacent tosaid collar.

4. In an arloor a member, a larger cylindrical part integral with saidmember, a smaller cylindrical projecting part, eccentric with saidlarger cylindrical part and integral therewith, an ecccntric collarrotatably monnted on said smaller cylindrical art and a Similareccentric collar fastene to said small cylindrical part, adjacent tosaid collar.

ERIC L. ROHS. Witnesses:

F. M. PLAGENS, C. A. LINDENMEER.

